Lapis lazuli ring jewelry semi-finished bare stone

Size: about 10x14mm / 12x16mm / 13x18mm / 18x25mm / 22x30mm / 30x40mm
Shape: Convex flat bottom
Product net weight: about 3g (10x14mm)
                     About 3g (12x16mm)
                     About 3g (13x18mm)
                     About 6g (18x25mm)
                     About 9g (22x30mm)
                     About 21g (30x40mm)
Natural stone: lapis lazuli

Color: random, each pattern is different